Ok, that helped a little.
I checked and there are no pptx scripts
Restarting Pythonista changes the error to lxml module (I am still looking for that...)
Traceback (most recent call last):
File "/var/mobile/Library/Mobile Documents/iCloud~com~omz-software~Pythonista3/Documents/2020-10/test.py", line 1, in <module>
from pptx import Presentation
File "/private/var/mobile/Containers/Shared/AppGroup/CB775338-75D0-4D40-BCA3-F31D6F8FFE4C/Pythonista3/Documents/site-packages-3/pptx/__init__.py", line 14, in <module>
from pptx.api import Presentation # noqa
File "/private/var/mobile/Containers/Shared/AppGroup/CB775338-75D0-4D40-BCA3-F31D6F8FFE4C/Pythonista3/Documents/site-packages-3/pptx/api.py", line 15, in <module>
from .package import Package
File "/private/var/mobile/Containers/Shared/AppGroup/CB775338-75D0-4D40-BCA3-F31D6F8FFE4C/Pythonista3/Documents/site-packages-3/pptx/package.py", line 11, in <module>
from .opc.package import OpcPackage
File "/private/var/mobile/Containers/Shared/AppGroup/CB775338-75D0-4D40-BCA3-F31D6F8FFE4C/Pythonista3/Documents/site-packages-3/pptx/opc/package.py", line 13, in <module>
from .oxml import CT_Relationships, serialize_part_xml
File "/private/var/mobile/Containers/Shared/AppGroup/CB775338-75D0-4D40-BCA3-F31D6F8FFE4C/Pythonista3/Documents/site-packages-3/pptx/opc/oxml.py", line 12, in <module>
from lxml import etree
ImportError: cannot import name 'etree'
After second call it’s the former error again.